﻿using System;
using System.Windows;
using System.Windows.Navigation;
using Columbus;
using HelloColumbusApplication.MessageBoxFeature;
using Microsoft.Phone.Controls;
using Microsoft.Phone.Shell;

namespace HelloColumbusApplication
{
    public partial class App : Application
    {
        /// <summary>
        /// Provides easy access to the root frame of the Phone Application.
        /// </summary>
        /// <returns>The root frame of the Phone Application.</returns>
        public PhoneApplicationFrame RootFrame { get; private set; }

        /// <summary>
        /// Constructor for the Application object.
        /// </summary>
        public App()
        {
            // Global handler for uncaught exceptions. 
            UnhandledException += Application_UnhandledException;

            // Show graphics profiling information while debugging.
            if (System.Diagnostics.Debugger.IsAttached)
            {
                // Display the current frame rate counters.
                Application.Current.Host.Settings.EnableFrameRateCounter = true;

                // Show the areas of the app that are being redrawn in each frame.
                //Application.Current.Host.Settings.EnableRedrawRegions = true;

                // Enable non-production analysis visualization mode, 
                // which shows areas of a page that are being GPU accelerated with a colored overlay.
                //Application.Current.Host.Settings.EnableCacheVisualization = true;
            }

            // Standard Silverlight initialization
            InitializeComponent();

            // Phone-specific initialization
            InitializePhoneApplication();
        }

        // Code to execute when the application is launching (eg, from Start)
        // This code will not execute when the application is reactivated
        private void Application_Launching(object sender, LaunchingEventArgs e)
        {
        }

        // Code to execute when the application is activated (brought to foreground)
        // This code will not execute when the application is first launched
        private void Application_Activated(object sender, ActivatedEventArgs e)
        {
        }

        // Code to execute when the application is deactivated (sent to background)
        // This code will not execute when the application is closing
        private void Application_Deactivated(object sender, DeactivatedEventArgs e)
        {
        }

        // Code to execute when the application is closing (eg, user hit Back)
        // This code will not execute when the application is deactivated
        private void Application_Closing(object sender, ClosingEventArgs e)
        {
        }

        // Code to execute if a navigation fails
        private void RootFrame_NavigationFailed(object sender, NavigationFailedEventArgs e)
        {
            if (System.Diagnostics.Debugger.IsAttached)
            {
                // A navigation has failed; break into the debugger
                System.Diagnostics.Debugger.Break();
            }
        }

        // Code to execute on Unhandled Exceptions
        private void Application_UnhandledException(object sender, ApplicationUnhandledExceptionEventArgs e)
        {
            if (System.Diagnostics.Debugger.IsAttached)
            {
                // An unhandled exception has occurred; break into the debugger
                System.Diagnostics.Debugger.Break();
            }
        }

        #region Phone application initialization

        // Avoid double-initialization
        private bool phoneApplicationInitialized = false;

        // Do not add any additional code to this method
        private void InitializePhoneApplication()
        {
            if (phoneApplicationInitialized)
                return;

            // Create the frame but don't set it as RootVisual yet; this allows the splash
            // screen to remain active until the application is ready to render.
            RootFrame = new PhoneApplicationFrame();
            RootFrame.Navigated += CompleteInitializePhoneApplication;

            // Columbus stuff:
            // Initializing navigation application.
            // Controller and view locators can be IoC registered functions, 
            // in this sample the are just implemented in this class
            var navApp = NavigationAppication.CreateSingleFrameApplication(
                LocateController, 
                LocateView,
                n => n.NavigateTo<HomeController>(c => c.HomePage(new HomePageMessage("Welcome to HelloColumbusApplication"))));
            PhoneApplicationService.Current.Activated += navApp.Activated;
            RootFrame.Navigated += navApp.StatusChanged;

            // Handle navigation failures
            RootFrame.NavigationFailed += RootFrame_NavigationFailed;

            // Ensure we don't initialize again
            phoneApplicationInitialized = true;
        }

        private static Controller LocateController(string controllerName)
        {
            // IoC container(s) can be used to resolve controllers and their dependencies by name (see other samples)

            if (controllerName == "HomeController")
                return new HomeController();

            if (controllerName == "MessageBoxController")
                return new MessageBoxController();
            
            throw new NotSupportedException(String.Format("Controller {0} is not registered", controllerName));
        }

        private static FrameworkElement LocateView(string viewName)
        {
            // IoC container(s) can be used to resolve views and their dependencies by name (see other samples)

            if (viewName == "HomePage")
                return new HomePage();
            if (viewName == "GreetingPage")
                return new GreetingPage();
            if (viewName == "AboutDialog")
                return new AboutDialog();
            if (viewName == "AfterDialogPage")
                return new AfterDialogPage();
            if (viewName == "AppSettingsPage")
                return new AppSettingsPage();
            if (viewName == "OkPage")
                return new OkPage();

            throw new NotSupportedException(String.Format("View {0} is not registered", viewName));
        }

        // Do not add any additional code to this method
        private void CompleteInitializePhoneApplication(object sender, NavigationEventArgs e)
        {
            // Set the root visual to allow the application to render
            if (RootVisual != RootFrame)
                RootVisual = RootFrame;

            // Remove this handler since it is no longer needed
            RootFrame.Navigated -= CompleteInitializePhoneApplication;
        }

        #endregion
    }
}